<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style>
			.rectangle-box {
				width: 600px;
				height: 600px;
				left: 50%;
				background: green;
				position: relative;
				transform: translateX(-50%);
				overflow: hidden;
			}

			.rectangle-item-list {
				overflow: hidden;
				width: 100%;
				height: 20%;
				text-align:center;
			}

			.rectangle-item-list-item {
				display: inline-block;
				width: 20%;
				height: 100%;
				background: #0000FF;
				margin: 5px;
			}
		</style>
	</head>
	<body>
		<div class="container">
			<div class="rectangle-box">
				<div class="rectangle-item-list">
					<div class="rectangle-item-list-item"></div>
					<div class="rectangle-item-list-item"></div>
					<div class="rectangle-item-list-item"></div>
					<div class="rectangle-item-list-item"></div>
				</div>
				<div class="rectangle-item-list">
					<div class="rectangle-item-list-item"></div>
					<div class="rectangle-item-list-item"></div>
					<div class="rectangle-item-list-item"></div>
					<div class="rectangle-item-list-item"></div>
				</div>
				<div class="rectangle-item-list">
					<div class="rectangle-item-list-item"></div>
					<div class="rectangle-item-list-item"></div>
					<div class="rectangle-item-list-item"></div>
					<div class="rectangle-item-list-item"></div>
				</div>
				<div class="rectangle-item-list">
					<div class="rectangle-item-list-item"></div>
					<div class="rectangle-item-list-item"></div>
					<div class="rectangle-item-list-item"></div>
					<div class="rectangle-item-list-item"></div>
				</div>
			</div>
		</div>
	</body>
</html>
